United States. Bureau of Labor Statistics. "December 1977," The Employment Situation (January 11, 1978). https://fraser.stlouisfed.org/title/144/item/56105, accessed on May 1, 2024.
United States. Bureau of Labor Statistics. "December 1977," The Employment Situation (January 11, 1978). https://fraser.stlouisfed.org/title/144/item/56105, accessed on May 1, 2024.